TUNES2GO Rock Box Bluetooth Portable PA System and Guitar Amplifier Built-in Bluetooth allows you to play music from any Bluetooth enabled device: such as laptop, tablet, or cell phone Max Power: 300W (75 rms) and 1" Tweeter @ 50Watts SD card and USB Flash drive reader input slots (supports up to 16GB) for each slot (1) XLR Microphone/Instrument Input, (1) 1/4 inch Instrument Input, (1) RCA Input, (1) 1/4 inch audio output and (1) 1/8 Auxiliary Input (3.5mm) Power Supply -110V AC or rechargeable battery power up to 12 Hours. USB port with 5V/2A can charge cell phone and tablet